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System and method for operating a steam turbine with digital control having validity checked data link with higher level digital control
System and method for operating a steam turbine with digital control having validity checked data link with higher level digital control
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机译：通过数字控制来操作汽轮机的系统和方法，该系统和方法具有带有高级数字控制的有效性检查数据链接
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摘要
A digital computer control system is provided for operating a steam turbine in an electric power plant. The computer develops steam valve position signals to control turbine speed and load. Various turbine temperature, pressure and other process parameter signals are coupled to the computer which stores the parameter values along with other parameters such as control loop setpoints in its memory. Another computer at the plant level or at the system dispatch level is coupled to the turbine computer through a data link which includes data link programs in each computer and data transmitter and receiver circuitry connected to the two computers. The higher level computer is the controlling computer on the data link. Control words are used to identify data transmission modes and validity checks are made on transmitted words. Turbine computer core data is accessible and transmittable to either higher level computer. Load demand and load rate are transmitted to the turbine computer from the dispatch computer, and the plant computer transmits setpoints to provide turbine control from the plant level. To check validity, a checksum quantity is generated with respect to predetermined data words at the transmission and receiver ends of the data link. The receiver compares the checksum quantities to validate linked data before such data is permitted to be used for turbine control or other purposes.
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